5305-01-494-9585, SCREW,CLOSE TOLERANCE

1560-01-494-9586 FITTING,STRUCTURAL COMPONENT,AIR

National Stock Number:
5305-01-494-9585

Federal Supply Class:
5305

National Item Identification Number:
014949585

Description:
SCREW,CLOSE TOLERANCE

Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Manufacturer Information:

NAS1790-3-6Y

80205

NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	0.698 INCHES MINIMUM AND 0.728 INCHES MAXIMUM
GRIP DIAMETER	0.2197 INCHES MINIMUM AND 0.2207 INCHES MAXIMUM
GRIP LENGTH	0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.339 INCHES MINIMUM AND 0.381 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
NOMINAL THREAD DIAMETER	0.190 INCHES
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-L-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR AMS6415 ASSN STD 4TH MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 4140 OVERALL OR STEEL COMP E4340 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 4340 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
POINT DIAMETER	0.050 INCHES NOMINAL
POINT STYLE	FLAT
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNJF
SPECIFICATION/STANDARD DATA	80205-NAS1790 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL AND CHROMATE OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD CLASS	3A
THREAD LENGTH	0.323 INCHES MINIMUM AND 0.353 INCHES MAXIMUM

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